High [CVE-2026-84739] GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the context of another user's browser session due to improper sanitization of path components in the merge request diff viewer
This high-severity GitLab advisory covers CVE-2026-84739 affecting GitLab.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the context of another user's browser session due to improper sanitization of path components in the merge request diff viewer.
- before 19.2.7
- before 19.3.3
- before 19.4.1
Official advisory · high-confidence parse· fetched 16 days ago·verify at source
- 19.2.7
- 19.3.3
- 19.4.1
Official advisory · high-confidence parse· fetched 16 days ago·verify at source
Mitigation
Upgrade to a fixed release: 19.2.7, 19.3.3, 19.4.1. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 16 days ago·verify at source
Discussion(0)
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